2012 Asphalt Pavement Survey Manual
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NORTH CAROLINA DEPARTMENT OF TRANSPORTATION PAVEMENT CONDITION SURVEY MANUAL 2012 2012 NCDOT Pavement Condition Survey TABLE OF CONTENTS Introduction ................................................................................................................................................................. 1 A. Getting Started ....................................................................................................................................................... 1 B. Conducting the Survey – General Guidelines ...................................................................................................... 2 C. The Form ................................................................................................................................................................ 3 D. Notes on Mileposting ............................................................................................................................................. 7 E. Instructions for Multi-Lane Sections ................................................................................................................... 9 F. Instructions for Urban Areas .............................................................................................................................. 12 G. Pavement Section Adjustment ............................................................................................................................ 12 H. Updating Section Information ............................................................................................................................ 14 I. Points to Remember .............................................................................................................................................. 16 J. Filling Out a New Pavement Condition Survey Form (Road Addition Sheet) ................................................ 17 K. Transmittal of Survey Sheets and Progress Reports ........................................................................................ 20 L. Pavement Condition Survey Distress Definitions – Flexible Pavements ......................................................... 21 1. ALLIGATOR CRACKING .................................................................................................................................. 22 Rating Transverse Cracking, Rutting and Raveling ................................................................................................ 30 2. TRANSVERSE CRACKING ................................................................................................................................ 31 3. RUTTING ........................................................................................................................................................... 38 4. RAVELING ......................................................................................................................................................... 42 5. OXIDATION (Weathering) ................................................................................................................................. 46 6. BLEEDING ......................................................................................................................................................... 47 7. RIDE QUALITY .................................................................................................................................................. 49 8. PATCHING ......................................................................................................................................................... 54 M. County List with SAP Number Codes ................................................................................................................ 58 N. Summary of Pavement Distress Conditions for Pavement Condition Survey ................................................ 59 O. PCS Rating Exercise ............................................................................................................................................. 61 ii 2012 NCDOT Pavement Condition Survey Introduction This manual has been developed to assist North Carolina Division of Highways personnel in conducting a condition survey of the paved road network in North Carolina. All state-maintained roads on the Primary and Secondary Systems are included in the survey. The goals of the condition survey are to assist in establishing a uniform level-of-service for maintenance across the state and to help maximize the benefit of all dollars spent on the roads in the state. Other benefits of the condition survey include: 1. A ranking system to prioritize maintenance needs 2. A summary of the overall condition of the pavements in any area of the state 3. A uniform rating system for each Division 4. A means to monitor the condition of any section of pavement (particular special design, use of materials or construction projects) 5. An historical record of pavement performance and maintenance practices. The previous surveys established descriptive and rating information for all flexible pavement sections of the state-maintained systems. A milepost scheme was also used to further pinpoint begin and end points for each section rated. All of this information has been stored in computer files and will be used in the 2012 survey. Only those who have attended the Pavement Condition Survey training class and have been given certification as a rater will be allowed to rate the pavement sections. Certifications are only good for one survey cycle. Each rater must be recertified before each survey cycle by attending the training class. If non-certified raters are used the rating forms will be returned to the county for re-rating by a certified rater. A digital copy of the “2012 Pavement Condition Survey Manual”, “2012 Pavement Condition Survey Presentation”, and “Road Addition Sheet” for new road sections can be found on Pavement Management section of the NCDOT Portal. The PMU section of the NCDOT portal can be found at: https://intranet.dot.state.nc.us/portal/Home/Teams/DOH/Operations/PMU/tabid/90/Default.aspx A. Getting Started Each rater should thoroughly familiarize himself with the Pavement Condition Survey Manual. A copy of this manual will be available for each rater. This manual will form the basis for this year's survey. Special attention should be placed on understanding how to code routes, how to milepost, and how to rate and mark the distress conditions. 1 2012 NCDOT Pavement Condition Survey B. Conducting the Survey – General Guidelines 1. Write Neatly & Legibly It is important that the form be filled out with a pencil, preferably a red pencil, as it is easier to read. Make a special effort when writing M's and N’s, as they can often be confusing to read. 2. Review the Printed PCS Survey Sheets Before Surveying The raters should thoroughly familiarize themselves with the computer printout for their areas. Some initial time should also be spent relating the computer listing of roadway sections to the county maps. 3. Use the Most Current County Maps Available While Conducting the Survey This will result in less confusion with new roads, SR number changes, etc. The rater should mark sections of the maps as they are rated. This will allow the rater to better visualize what has not been surveyed. 4. Survey All Newly Constructed or Formerly Unpaved Roads New roads and newly paved (formerly unpaved) roads should be surveyed even if they are not on the map or printout. 5. Be Safety Conscious at All Times Use car warning (hazard) lights and a yellow flashing light on your car roof. Always be aware of other traffic in relation to your slower speed. 6. Begin Survey at the Beginning or End of a Route IMPORTANT: Do NOT survey any route by starting in the middle. 7. Measure Rutting on Foot at Least Once a Day Raters should get out of the car and measure rutting at least once a day preferably in the morning before rating begins. Use a straight edge and ruler. This will give the rater a better feel for the severity of rutting. 8. Travel at 15-20 mph Greater Speeds Will Reduce Survey Accuracy 9. Closer Inspection Will Sometimes Be Required If unsure of a distress or severity or unable to determine a type of distress, pull off the pavement to inspect the condition. 10. Ride Towards the Sun When Surveying Cracking and distresses are more visible due to shadowing. 11. Do Not Rate Roads When They Are Wet/Damp Wet and damp roads can cause distress conditions to appear worse than they actually are. 2 2012 NCDOT Pavement Condition Survey 12. Travel in the Direction of Mileposting Whenever Possible The printout is simpler to read when traveling a road in the same direction that it is mileposted. If it is necessary to travel a section in the opposite direction, care should be taken that the distress information is filled in on the proper line. C. The Form 1. A printout form with previous survey data and blanks for new data will be used for the 2012 pavement condition survey. Existing sections of road are set up with mileposts and descriptions from previous surveys. 2. Brief review of the form. a. County Section: County subdivided into work sections. b. Route: The sections are listed with the US routes first, followed by NC routes and then Secondary routes. They are listed numerically from lowest to highest. The routes are 8 digits and coded as explained on page 8. c. Direction: Indicates the direction of travel for a divided highway only. This code is necessary because each direction of travel